While you can’t turn back time, you can recapture the days of youth by returning to a familiar place with old friends. That’s what I discovered on a recent Cape Cod biking trip with two of my best friends from college. Today, we live in different corners of the country, and it’s hard to find time to reconnect. So when an opportunity arose to retrace my steps—er, pedals—as a bike-tour leader during college summers, I called my friends and asked them to meet me on the Cape. We dropped everything but our helmets and convened in Provincetown, Massachusetts, where the no-training-required bike rides are more about scenery than sweating.